The behavior I would like to achieve is a bit different. I would like to have a collapsable admonition, so I will need a title, Also the color: parameter can be used to disable the outline color, but not the background one. Here is an example with a white theme:
```ad-blank
color:
test
```
I would like to get admonition without both the title icon and background color.
The main idea is to be able to hide big blocks of information inside such blocks without drawing additional attention. For example, explanations and examples can be easily skipped if not needed but will always be here for you to read.